Method of manufacturing glass case goods.



J. I. ARBOGAST.

METHOD OF MANUFACTURING GLASS CASE GOODS.

APPLICATION FILED JULY 16, 1910.

INVENTOR WITNESSES yzmma run sra'rns arnn JOHN I. ARBOGAST. OFPITTSBURG, PENNSYLVANIA, ASSIGNOR OE ONE-HALF TO HENRY L. COLLINS, OFPITTSBURG, PENNSYLVANIA.

METHOD OF MANUFACTURING GLASS CASE GOODS.

Specification of Letters Patent.

laihentcdv Sept. 1.2, 39M.

Application filed July 16, 1910. Serial No. 572,256.

To all whiom it may concern:

Be it known that I, JOHN I. AnnooAsr, a citizen of the United States ofAmerica, residing at S. S- Pittsburg, in the county of Allegheny andState of Pennsylvania, have invented certain new and useful Improvementsin Methods of Manufacturing Glass lase Goods, of which the following isa specification, reference being had therein to the accompanyingdrawing.

This invention relates to a method of manufacturing vitreous case goods,especially that class of glass ware heretofore produced by uniting twoseparate grades of molten glass to form an article having an interiorcolor or finish different from the exterior color or finish of the ware.

The primary object of this invention is to obviate the necessity ofusing two masses or batches of molten glass in the production of casegoods by simply using one mass of molten glass and treating the samewhereby the article produced will have the same appearance and. effectas though two masses of molten glass were used, thereby dispensing withapproximately one-half the operations heretofore incurred by the use oftwo masses of molten glass.

A further object of the invention is to partially complete a piece ofware in such a manner that it can be easily decorated and finished topresent any design desired, the completed ware having an artistic andattractive finish representing the highest de grce of skill in thisparticular art, yet being produced by ordinary glass-house laborers notskilled in any particular lineor grade of ware.

A still further object of the invention is i to provide means as will behereinafter set forth for producing glass balls, shades, globes, andother spherical hollow glass ware having fluorescent and opalesoontproperties distinguished from ordinary case goods on account of thesolidity of color, and combined refractory and resplendent. qualities.

With these and such other objects in View as may hereinafter appear,reference will now be had to the drawing, where there is illustratedmeans capable of accomplishing the above results.

In the drawing: Figure 1. is a plan of an apparatus in accordance withthis invention. Fig. 2 is a front elevation of the same partly brokenaway and partly in section. Fig. 3

accomplished by gathering a mass of molten.

is an end view of the same. Fig. 4 is a perspective view ofan auxiliarymold forming part of the apparatus, and Fig. 5 is a vertical sectionalview of a blow mold.

Before describing the details of construction entering into theapparatus, it is thought best to outline briefly the steps I take inconnection with the apparatus in producing a piece of ware.

First, I disintegrate and pulvcrize a mass of opaque glass, this beingexpeditiously glass, depositing the same in water and then crushing thecooled glass until a powder is obtained. A combined machine and handblow pipe having a flared end is now omploycd and the flared cud of thepipe heated and placed in a suitable blank mold. Au auxiliary mold isplaced in the blank mold, over the flared end of the pipe and then thepowdered opal glass deposited in the a axiliary mold to adhere to theheated end of the blow pipe and form a batch foundation of glass uponthe end of the pipe. Air is then admitted to the pipe to partially blowthe batch foundation and with the core partly completed, a mass ofmolten glass is deposited upon the batch foundation'to complete thebatch, another supply of air admittcd to the blow pipe to complete thecore and then the core and pipe are removed, in-' verted in a blow mold,and the core manually blown to produce the ware. While this is thepreferable procedure, approximately the same resultant can be obtainedby reversing the firstfew' steps of the method, and thereby dispcnsingwith the auxiliary mold and permit an operator to decorate a piece ofware according to his esthetic taste. For instance, a mass of moltenglass constituting in. this instance a batch foundation can be depositedin the blank mold upon the heat cd end of the blow pipe, the corepartially formed or blown, and then the powdered opal glass distributedupon the partially blown batch foundation to complete the batch. Theother stcpsof the method can then be successively performed as aboverecited.

The apparatus comprises a. stand 1, preferably oblong to accommodateblank molds used in the production of the ware and to facilitate thevarious steps of the method; Arranged below the stand is an air supplypipe 2- provided with a plurality of Ts 3 therethrough.

supporting valves 4. These valves are pro-. vided with ai-n outletnipples 5 and the passage of air through said valves is controlled by anormally closed spring-held valve stem 6 arranged whereby a pressure ofthe foot will open the valve 4 and allow air to pass Detachably mountedupon the nipples 5 of the valves 4 are interchangeable blow pipes 7,constituting machine and hand blow pipes. The upper end of each pipe isflared, as at 8, and extends through a slot 9 pr0- vided therefor in theforward edge of the stand 1, the end of each pipe protruding above thestand.

Arranged upon' the stand are a-"plurality of blank molds, butas thesemolds are iden tical in construction, itis only necessary to describeone of said molds. The blank mold comprises base sections 10 and topsections 11 having apertured lugs 13 by which said sections arepivotally mounted upon a post 14, carried by the stand 1.. The basesections 10 have the confronting sides thereof recessed, as at 15, andcut-away, as at 16, to

- provide clearance for the upper flared end of the blow pipe 7. Theconfronting faces of the top sections 11 are recessed, as at 12, andwhen the base and top sections are closed'a cavity is formed within themold.

One of the vbase sections 10 has the upper edge thereof notched, as at17, to receive a dependinglug 18, carried by the handle 19 of a tubularauxiliary mold 20. This mold is placed in the base sections 10 of theblank mold. after they are closed, and upon the upper flared end 8 ofthe pipe 7.

Prior to placing the blow pipe 7 in position, the flared end thereof isthoroughly heated, and after the auxiliary mold 20 has been placed uponthe flared end,- the powdered opaque glass is deposited in the auxiliarymold 20 and as it impinges the hot end of the blow pipe 7, it adheresthereto and forms within the auxiliary mold 520 a plastic batchfoundation 21. As the auxiliary mold 20 is removed a pressure of air isadmitted to the pipe 7 to partially blow the batch foundation 21. Theauxiliary mold 2O preventsthe mass of glass 21 from contacting with thewalls of the recesses 15, and correctly positions the mass whereby whenthe air engages the same it will be elongated or forced upwardly withinthe blank mold. This is all accomplished with the top sections 11 openand immediately upon the batch foundation being partially blown, a massof molten glass is placed in the base sections 10, upon the partiallyblown batch foundation to complete the core, the top sections 11 closed,and then a second pressure of air admitted to the blow pipe 7 to blowthe complete batch into the recesses 12 of the top sections 11 to formthe core. The core is now completed and by opening the sections 10 and11, the blowpipe 7 and the core can be removed. The next step is to warmin or again heat the core while it adheres to the end of the pipe 7.After being warmed inthe core is inverted in a blow mold 22 andismanually blown therein to form a piece of ware having an interimfinish that differentiates from the exterior finish in color and inquality.

As heretofore stated, it is possible to place the molten glass upon theend of the blow pipe and after partially forming thecore to deposit thepowdered opaque glass upon the batch before further blowing the same, inwhich instance it would not be necessary to use the auxiliary mold.

it will he observed from the foregoing that my invention is a radicaldeparture from the present method of manufacturing case goods, theprinciple involving the use of a powdered glass for producing the batchfoundation and employing a combined machine and hand blow pipe thatpermits of a piece of ware being made at a comparatively small cost andwith that degree of certainty that the waste is reduced to a minimum.

\Vhat I claim, is:

A method of imumfacturing glass case 1 goods consisting of heating theoutlet end of a blow pipe to a. temperature capable of melting a mass ofpowdered glass. then positioning said pipe with the heated end up into acore forming mold, then forming 1 within the mold directly upon and bythe heated end of said pipe from a mass of powdered glass a hatchfoundation spaced throughout from the walls of the mold, thensurrounding the batch foundation with a mass of plastic glass of adifferen character from that of the batch foundation to complete thebatch, then forcing air through.

said pipe to form the batch into a core, then positioning the pipe withthe core thereon in a blow mold, and then blowing through the pipe tocomplete the article in the blow mold.

, In testimony whereof I afiix my signature in the presence of twowitnesses.

JOHN I. ARBOGAST. \Vit ncsscs:

Max ll. Snomvrrz, l\'. ll. l-lu'rnnn.

